Design Architecture

Download An ASIC Low Power Primer: Analysis, Techniques and by Rakesh Chadha PDF

By Rakesh Chadha

This e-book presents a useful primer at the ideas used in the layout of low energy electronic semiconductor units. Readers will enjoy the hands-on process which begins shape the ground-up, explaining with uncomplicated examples what strength is, the way it is measured and the way it affects at the layout technique of application-specific built-in circuits (ASICs). The authors use either the Unified strength layout (UPF) and customary energy layout (CPF) to explain intimately the facility purpose for an ASIC after which consultant readers via numerous architectural and implementation strategies that may support meet the ability cause. From studying procedure strength intake, to innovations that may be hired in a low energy layout, to a close description of 2 trade criteria for shooting the facility directives at numerous stages of the layout, this e-book is full of details that might provide ASIC designers a aggressive part in low-power design.

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Extra info for An ASIC Low Power Primer: Analysis, Techniques and Specification

Sample text

This allows the current based models to be usable for dynamic simulations also. Note that the power models described in Sect. 2 describe the total energy dissipated in a transition and thus are not usable for detailed time-domain simulations of the power supply network. The details of the CCS power models are described next. 1 Leakage Current This is analogous to the leakage power as described in Sect. 3. Instead of the leakage power, the model specifies the leakage current from the power supply.

022”); } } } } Note that the output charging power for the output Q bus would depend upon the output capacitive load driven by the Q pins of the memory. However, in most practical cases, the dynamic power dissipation in the memory is governed by the read and write performed by the clock. The active power computation of a memory instance with representative activity at its pins is described in Chap. 4. The next section describes the leakage power modeling for the SRAM macros. 2 As an example, the leakage power for a memory macro can be represented as: cell_leakage_power : 1622700; The memory macros can be thought of as comprised of two portions: the core memory array (which stores the memory information), and the peripheral logic which is comprised of the address decoders, bit-line prechargers, sense amplifiers, and other driver circuitry, etc.

One major advantage of using current based models is that these are usable for dynamic power supply simulations to estimate power supply transient noise based upon the activity and the decoupling capacitances present in the system. 5 Summary The leakage power is dependent only on the state of nets in the design (logic-0 or logic-1) whereas the active power is dependent upon the switching activity in the design. The activity can be at the input or at the output pins of the cells.

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